GFC 500 Autopilot with ESP Part 23 AML STC Maintenance Manual Page 25190-02291-01 Revision 18. GFC 500 Software Load and Configuration Procedures8.1 GMC 507 and GSA 28 Software Loading1. Apply power to the G5/GFC 500 system.2. On power-up, the GMC 507 and GSA 28 software versions are checked by the system.If there is a mismatch (due to a replaced unit), the correct software is automaticallyloaded to the unit(s) from the G5. Refer to the Garmin G5 Electronic Flight InstrumentPart 23 AML STC Maintenance Manual including ICA, p/n 190-01112-11 if the G5 wasreplaced.8.2 GFC 500 System ConfigurationFor configuration items not related to the GFC 500 Automatic Flight Control System, refer to theGarmin G5 Electronic Flight Instrument Part 23 AML STC Maintenance Manual including ICA,p/n 190-01112-11.NOTE: The G5 must be configured in accordance with the Garmin G5 Electronic InstrumentPart 23 AML STC Installation Manual prior to configuring the GFC 500 Automatic Flight ControlSystem.NOTE: To start the G5 in configuration mode, hold down the knob while powering on the G5.Configuration selections are made by rotating and pressing the knob on the face of the G5 asnecessary to select the correct configurations. Each configuration item is saved as it is made.Configure the GFC 500 Autopilot as shown on the aircraft-specific installation manualaddendum (190-02291-XX). Refer to the Master Drawing List 005-01264-00 for the correctinstallation manual addendum part number.